Answer:
Explanation:
To calculate the momentum of a moving object multiply the mass of the object times its velocity. The symbol for momentum is a small p. So, the momentum of the object is calculated to be 8.0 kg-m/s. Note the unit for momentum.
The height reached by the two carts after collision is determined as 5.34 m.
<h3>
Initial velocity of Cart A</h3>
Apply the principle of conservation of mechanical energy.
K.E = P.E
v = √2gh
v = √(2 x 9.8 x 12)
v = 15.34 m/s
<h3>Final velocity of the two carts after the collision</h3>
Apply the principle of conservation of linear momentum for inelastic collision.
m₁u₁ + m₂u₂ = v(m₁ + m₂)
8(15.34) + 4(0) = v(8 + 4)
122.72 = 12v
v = 10.23 m/s
<h3>Height reached by both carts</h3>
Apply the principle of conservation of mechanical energy.
P.E = K.E
mgh = ¹/₂mv²
h = v²/(2g)
h = (10.23²) / (2 x 9.8)
h = 5.34 m
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Answer:
Explanation:
THE GIVEN sheet can be taken as two horizontal force with surface charge density is
at one surface is ∈_1 = 
at oher surface is ∈_2= 
the magnitude of electric field due to surface charge is given as
So, electric field at P (2 CM below from surface is) = E_1 +E_2
Answer:
A battery consists of some number of voltaic cells made up of two half-cells that are connected in series by a conductive electrolyte containing metal cations (positive ions). It contains one half-cell with an electrolyte and the negative electrode, the electrode to which anions (negatively charged ions) migrate, and the other half-cell includes electrolyte and the positive electrode, to which cations (positively charged ions) migrate. Cations gain electron at the cathode, while anions are loose electrons at the anode.
The voltage developed across a cell's terminals depends on the energy release of the chemical reactions of its electrodes and electrolyte, so a strong metal at the anode will guarantee a higher energy release.
Also, since the reaction is redox, knowing about the nature of metals, especially their order in the electrochemical series will determine the ease of reaction when used for a battery.
